# Babosa de mar (Pteraeolidia semperi), Anilao, Filipinas, 2023-08-23, DD 94

- By: Diego Delso
- Date: 2023-08-23
- Classification: Photograph
- Museum: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Babosa_de_mar_(Pteraeolidia_semperi),_Anilao,_Filipinas,_2023-08-23,_DD_94.jpg)
- Rights: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0)
- Picture: https://invisiblenetwork.ai/thumbs/commons/thumb/f/f1/Babosa_de_mar_%28Pteraeolidia_semperi%29%2C_Anilao%2C_Filipinas%2C_2023-08-23%2C_DD_94.jpg/1920px-Babosa_de_mar_%28Pteraeolidia_semperi%29%2C_Anilao%2C_Filipinas%2C_2023-08-23%2C_DD_94.jpg
- Who can see it: Teens profiles and older (museums give no ratings; placed by Invisible Network from the museum's own words)

Blue dragon (Pteraeolidia semperi), Anilao, Philippines. This sea slug, of a maximal length of about 21 centimetres (8.3 in), is widespread throughout the Indo-Pacific and can be fount at a depth of up to 30 metres (98 ft). Pteraeolidia has evolved a method of capturing and farming microscopic plants (zooxanthellae) in its own body. The plants flourish in this protected environment and as they convert the sun's energy into sugars, they pass a significant proportion on to the nudibranch for its own use. The slug gains enough photosythetically derived sugars to sustain it without feeding.